PT Journal
AU Cirigliano, V
   Diaz-Calderon, D
   Falkowski, A
   Gonzalez-Alonso, M
   Rodriguez-Sanchez, A
TI Semileptonic tau decays beyond the Standard Model
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2022
BP 152
EP 61pp
VL 04
IS 4
DI 10.1007/JHEP04(2022)152
LA English
DE Semi-Leptonic Decays; Specific BSM Phenomenology
AB Hadronic tau decays are studied as probe of new physics. We determine the dependence of several inclusive and exclusive tau observables on the Wilson coefficients of the low-energy effective theory describing charged-current interactions between light quarks and leptons. The analysis includes both strange and non-strange decay channels. The main result is the likelihood function for the Wilson coefficients in the tau sector, based on the up-to-date experimental measurements and state-of-the-art theoretical techniques. The likelihood can be readily combined with inputs from other low-energy precision observables. We discuss a combination with nuclear beta, baryon, pion, and kaon decay data. In particular, we provide a comprehensive and model-independent description of the new physics hints in the combined dataset, which are known under the name of the Cabibbo anomaly.
ER